WASHINGTON — The Trump administration is celebrating the 90-day truce it reached in its trade war with China as a significant breakthrough despite scant details, a hazy timetable and widespread skepticism that Beijing will yield to U.S. demands anytime soon.

“This is just an enormous, enormous event,” Larry Kudlow, President Donald Trump’s top economic adviser, said Monday of the cease-fire that Trump and President Xi Jingping reached over the weekend on the sidelines of an international economic summit in Buenos Aires, Argentina.